Grate-bar support



July 16, 1929. w. H. RIDGWELL 172L413 (RATE BAR SUPPORT 4 Filed June 28,1927 2 Sheets-Sheet 1 kzvyl.

IN V EN TOR.

wzmaq wezz ATTORNEYS.

July 16, 1929. w, H'RmGwELL 1.721 413 GRATE BAR SUPPORT 4 Filed June28/1927 2 Sheets-Sheei. 2

A TTORNEY$ Patented July 16, 1929.

UNITED STATES WILLIAM HENRY RIDGWELL, OF NORFOLK, VIRGINIA.

GRATE-BAR SUPPORT.

Application filed June 28,

This invention relates to bearer bars to be used in connection withboilers, more specifically, marine boilers.

The principal object of this invention is to provide additionalsupports, in the way of bearer bars, to grate bars, where the grate barsare forced to span a considerable space.

Another object of this invention is to provide means whereby thesupporting bearer bars may be removed and replaced without disturbingthe grate bars.

Other objects will be shown and described in the specification andclaims.

In the drawings Figure 1 is an end view of a furnace with a portion ofthe front head of the boiler removed.

Figure 2 is a top plan of the furnace with the top portion removed, andbearer bars assembled.

Figure 3 is a section taken along line 3-3 of Figure 2.

Figure 4 is a section taken along line 44; of Figure 2.

Figure 5 is a perspective of a lug, broken away from the side bearerbar.

Figure 6 is a perspective of the transverse bearer bar. V

Figure 7 is a modified form of bearer bar,

and

Figure 8 is a rear elevation of the lug, broken away from the sidebearer bar.

In the drawings, like numerals designate similar parts.

Numeral 1 designates the outside casing of a corrugated furnace having afront bearer bar 2 and a back bearer bar 3 securely held between thecorrugated walls 1. Resting on the front and back bearer bars are sidebearer bars 4 coinciding with the corrugations of the outside wall 1.Extending, downwardly from said side bearer bars are lugs- 5 having aside flange 6 and a beveled bottom flange 7. Projecting up from the bottom flange is a bolt 8. Beneath the flange 7 is a support 9 whichcontinues along the back side of said lug 5 to form a support for theside bearer bar 1. Resting in the lug 5 are transverse bearer bars 10which support the grate bars 11.

Figure 7 shows a modified form of bearer bar which may be used whengreater air 1927. Serial No. 202,034.

space is desired. This bar consists of parallel members 12, with airspaces 13 formed by separators 14, holding the parallel members 12apart.

It is well known in the art to have side bars resting on end bearerbars, but so far as I know, it is new and novel to have side bearersbars with lugs for the purpose of forming supports by the means ofadditional bearer bars for the grate bars in the manner shown anddescribed. 1

It has been my experience that where the grate bars are subjected togreat strain by virtue of along span, they break very quickly when onlyslightly burned. By having supports at the points of greatest stress,the life of the grate bars is materially lengthened. By the use of thesesupports, a material saving is made in the depth of the grate bars inthat the arc in the grate bars need not be nearly so great, therebyreducmg the weight of the grate bars which results in a substantialsaving in material.

hen it is desired to replace the transverse bearer bars, all that isnecessary is to remove the bolts holding the transverse bear-- er barsin place. I-Ieretofore, so far as I know, it was necessary to remove thegrate bars before the, transverse bearer bars could be removed orreplaced. In my device, I can remove and replace the transverse bearerbars without disturbing the grate bars.

Knowing that the same purpose may be accomplished by other means, myinvention is not limited to the exact manner or means as disclosedherein.

Having described my invention, what I claim as new and novel is:

1. A grate bar support comprising bearer bars positioned beneath andaway from the ends of a grate bar, lugs for supporting thesaid bearerbars, each of said lugs comprising a side and bottom flange, said bottomflange having a removable projection thereon to permit the removal ofsaid transverse bearer bars without disturbing the grate bar.

2. A grate bar support comprising bearer bars positioned beneath andaway from the ends of a grate bar, lugs for supporting the said bearerbars, each of said lugs comprising a side and bottom flange, said bottomflange having one edge beveled and a removable projection adjacent saidbeveled edge to ably supporting said transverse bearer bars permit theremoval of sald transverse bearer and lormed to permit. horizontalremoval of 10 bars Withoutdisturbing the grate bar. the bearer barswithout disturbing the said 3. In a boiler, a grate bar, means at eachgrate bar. 0f its, ends for supportlng said grate bar, In testimonywhereof I allix my signatransverse bearer bars intermediate the endsture. of said-grate bar to provlde auxiliary supports for said gratebar, means for reIn0v- WVILLIAM HENRY RIDGVELL.

